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Hi Shaik

There is some error while MR jobs are running. To get the root cause please post in the  error log from the failed task.

You can browse the Job Tracker web UI and choose the right job Id and drill down to the failed tasks to get the error logs.

Bejoy KS

Sent from handheld, please excuse typos.

-----Original Message-----
From: shaik ahamed <[EMAIL PROTECTED]>
Date: Fri, 6 Jul 2012 17:09:26
Subject: hi all

*Hi users,*
*              As im selecting the distinct column from the vender Hive
table *
*Im getting the below error plz help me in this*
*hive> select distinct supplier from vender_sample;*

Total MapReduce jobs = 1
Launching Job 1 out of 1
Number of reduce tasks not specified. Estimated from input data size: 1
In order to change the average load for a reducer (in bytes):
  set hive.exec.reducers.bytes.per.reducer=<number>
In order to limit the maximum number of reducers:
  set hive.exec.reducers.max=<number>
In order to set a constant number of reducers:
  set mapred.reduce.tasks=<number>
Kill Command = /usr/local/hadoop/bin/../bin/hadoop job
-Dmapred.job.tracker=md-trngpoc1:54311 -kill job_201207061535_0005
Hadoop job information for Stage-1: number of mappers: 1; number of
reducers: 1
2012-07-06 17:03:13,978 Stage-1 map = 0%,  reduce = 0%
2012-07-06 17:03:20,001 Stage-1 map = 100%,  reduce = 0%
2012-07-06 17:04:20,248 Stage-1 map = 100%,  reduce = 0%
2012-07-06 17:04:23,262 Stage-1 map = 100%,  reduce = 100%
Ended Job = job_201207061535_0005 with errors
Error during job, obtaining debugging information...
Examining task ID: task_201207061535_0005_m_000002 (and more) from job

Task with the most failures(4):
Task ID:
FAILED: Execution Error, return code 2 from
MapReduce Jobs Launched:
Job 0: Map: 1  Reduce: 1   HDFS Read: 99143041 HDFS Write: 0 FAIL
Total MapReduce CPU Time Spent: 0 msec